Arctic microbial ecosystems and impacts of climate change
As a contribution to the International Polar Year program MERGE (Microbiological and Ecological Responses to Global Environmental change in polar regions), studies were conducted on the terrestrial and aquatic microbial ecosystems of northern Canada (details at: http://www.cen.ulaval.ca/merge/). The...
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ftcarletonuniv:oai:curve.carleton.ca:24999 2023-05-15T14:29:30+02:00 Arctic microbial ecosystems and impacts of climate change Vincent, W.F. Whyte, L.G. Greer, C.W. Laurion, I. Suttle, C. Lovejoy, C. Corbeil, J. Mueller, D.R. 2009-11-01 https://curve.carleton.ca/d652df2b-4021-4a09-b313-3de521c4a401 https://doi.org/10.1016/j.polar.2009.05.004 http://www.sciencedirect.com/science/article/pii/S187396520900022X unknown https://curve.carleton.ca/d652df2b-4021-4a09-b313-3de521c4a401 http://dx.doi.org/10.1016/j.polar.2009.05.004 http://www.sciencedirect.com/science/article/pii/S187396520900022X Journal Article 2009 ftcarletonuniv https://doi.org/10.1016/j.polar.2009.05.004 2022-01-23T08:18:40Z As a contribution to the International Polar Year program MERGE (Microbiological and Ecological Responses to Global Environmental change in polar regions), studies were conducted on the terrestrial and aquatic microbial ecosystems of northern Canada (details at: http://www.cen.ulaval.ca/merge/). The habitats included permafrost soils, saline coldwater springs, supraglacial lakes on ice shelves, epishelf lakes in fjords, deep meromictic lakes, and shallow lakes, ponds and streams. Microbiological samples from each habitat were analysed by HPLC pigment assays, light and fluorescence microscopy, and DNA sequencing. The results show a remarkably diverse microflora of viruses, Archaea (including ammonium oxidisers and methanotrophs), Bacteria (including filamentous sulfur-oxidisers in a saline spring and benthic mats of Cyanobacteria in many waterbodies), and protists (including microbial eukaryotes in snowbanks and ciliates in ice-dammed lakes). In summer 2008, we recorded extreme warming at Ward Hunt Island and vicinity, the northern limit of the Canadian high Arctic, with air temperatures up to 20.5 °C. This was accompanied by pronounced changes in microbial habitats: deepening of the permafrost active layer; loss of perennial lake ice and sea ice; loss of ice-dammed freshwater lakes; and 23% loss of total ice shelf area, including complete break-up and loss of the Markham Ice Shelf cryo-ecosystem. These observations underscore the vulnerability of Arctic microbial ecosystems to ongoing climate change. Keywords Arctic; Biodiversity; Climate change; Ecosystems; Ice; Microbiology; Permafrost Article in Journal/Newspaper Arctic biodiversity Arctic Climate change Ice Ice Shelf Ice Shelves International Polar Year Markham Ice Shelf permafrost Sea ice Ward Hunt Island CURVE - Carleton University Research Virtual Environment Arctic Canada Markham ENVELOPE(-57.358,-57.358,-64.296,-64.296) Ward Hunt Island ENVELOPE(-74.161,-74.161,83.102,83.102) Hunt Island ENVELOPE(-100.601,-100.601,58.788,58.788) Polar Science 3 3 171 180 |
institution |
Open Polar |
collection |
CURVE - Carleton University Research Virtual Environment |
op_collection_id |
ftcarletonuniv |
language |
unknown |
description |
As a contribution to the International Polar Year program MERGE (Microbiological and Ecological Responses to Global Environmental change in polar regions), studies were conducted on the terrestrial and aquatic microbial ecosystems of northern Canada (details at: http://www.cen.ulaval.ca/merge/). The habitats included permafrost soils, saline coldwater springs, supraglacial lakes on ice shelves, epishelf lakes in fjords, deep meromictic lakes, and shallow lakes, ponds and streams. Microbiological samples from each habitat were analysed by HPLC pigment assays, light and fluorescence microscopy, and DNA sequencing. The results show a remarkably diverse microflora of viruses, Archaea (including ammonium oxidisers and methanotrophs), Bacteria (including filamentous sulfur-oxidisers in a saline spring and benthic mats of Cyanobacteria in many waterbodies), and protists (including microbial eukaryotes in snowbanks and ciliates in ice-dammed lakes). In summer 2008, we recorded extreme warming at Ward Hunt Island and vicinity, the northern limit of the Canadian high Arctic, with air temperatures up to 20.5 °C. This was accompanied by pronounced changes in microbial habitats: deepening of the permafrost active layer; loss of perennial lake ice and sea ice; loss of ice-dammed freshwater lakes; and 23% loss of total ice shelf area, including complete break-up and loss of the Markham Ice Shelf cryo-ecosystem. These observations underscore the vulnerability of Arctic microbial ecosystems to ongoing climate change. Keywords Arctic; Biodiversity; Climate change; Ecosystems; Ice; Microbiology; Permafrost |
format |
Article in Journal/Newspaper |
author |
Vincent, W.F. Whyte, L.G. Greer, C.W. Laurion, I. Suttle, C. Lovejoy, C. Corbeil, J. Mueller, D.R. |
spellingShingle |
Vincent, W.F. Whyte, L.G. Greer, C.W. Laurion, I. Suttle, C. Lovejoy, C. Corbeil, J. Mueller, D.R. Arctic microbial ecosystems and impacts of climate change |
author_facet |
Vincent, W.F. Whyte, L.G. Greer, C.W. Laurion, I. Suttle, C. Lovejoy, C. Corbeil, J. Mueller, D.R. |
author_sort |
Vincent, W.F. |
title |
Arctic microbial ecosystems and impacts of climate change |
title_short |
Arctic microbial ecosystems and impacts of climate change |
title_full |
Arctic microbial ecosystems and impacts of climate change |
title_fullStr |
Arctic microbial ecosystems and impacts of climate change |
title_full_unstemmed |
Arctic microbial ecosystems and impacts of climate change |
title_sort |
arctic microbial ecosystems and impacts of climate change |
publishDate |
2009 |
url |
https://curve.carleton.ca/d652df2b-4021-4a09-b313-3de521c4a401 https://doi.org/10.1016/j.polar.2009.05.004 http://www.sciencedirect.com/science/article/pii/S187396520900022X |
long_lat |
ENVELOPE(-57.358,-57.358,-64.296,-64.296) ENVELOPE(-74.161,-74.161,83.102,83.102) ENVELOPE(-100.601,-100.601,58.788,58.788) |
geographic |
Arctic Canada Markham Ward Hunt Island Hunt Island |
geographic_facet |
Arctic Canada Markham Ward Hunt Island Hunt Island |
genre |
Arctic biodiversity Arctic Climate change Ice Ice Shelf Ice Shelves International Polar Year Markham Ice Shelf permafrost Sea ice Ward Hunt Island |
genre_facet |
Arctic biodiversity Arctic Climate change Ice Ice Shelf Ice Shelves International Polar Year Markham Ice Shelf permafrost Sea ice Ward Hunt Island |
op_relation |
https://curve.carleton.ca/d652df2b-4021-4a09-b313-3de521c4a401 http://dx.doi.org/10.1016/j.polar.2009.05.004 http://www.sciencedirect.com/science/article/pii/S187396520900022X |
op_doi |
https://doi.org/10.1016/j.polar.2009.05.004 |
container_title |
Polar Science |
container_volume |
3 |
container_issue |
3 |
container_start_page |
171 |
op_container_end_page |
180 |
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1766303498647896064 |